jQuery Plugin to Animate Transforms

animateTransform.jquery.js

$.fn.animateTransform = function(/* [start,] end [, duration] [, callback] */){
  var start = null, end = null, duration = 400, callback = function(){};
  for(var i=0; i<arguments.length; i++){
    if(typeof(arguments[i]) == "string"){
      if(!start) start = arguments[i];
      else end = arguments[i];
    } else if(typeof(arguments[i]) == "number"){
      duration = arguments[i];
    } else if(typeof(arguments[i]) == "function"){
      callback = arguments[i];
    }
  }
  if(start && !end){
    end = start;
    start = null;
  }
  if(!end) return;
  if(start){
    this.css("transform", start);
  }
  if(duration < 16) duration = 16;
  var transitionB4 = this.css("transition");
  this.css("transition", "transform " + duration + "ms");
  this.css("transform", end);
  var $el = this;
  setTimeout(function(){
    $el.css("transition", transitionB4 || "");
    $el.css("transform", end);
    callback();
  }, duration);
};

animateTransform.jquery.min.js

$.fn.animateTransform=function(){for(var a=null,b=null,c=400,d=function(){},e=0;e<arguments.length;e++)"string"==typeof arguments[e]?a?b=arguments[e]:a=arguments[e]:"number"==typeof arguments[e]?c=arguments[e]:"function"==typeof arguments[e]&&(d=arguments[e]);if(a&&!b&&(b=a,a=null),b){a&&this.css("transform",a),c<16&&(c=16);var f=this.css("transition");this.css("transition","transform "+c+"ms"),this.css("transform",b);var g=this;setTimeout(function(){g.css("transition",f||""),g.css("transform",b),d()},c)}};

I think once transform start, the animate must go done, you can't stop in middle,
so I suggest add a mark like this.addClass('is-processing'), when animateTransform triggered again,
we can check the mark , if it's in processing, return and do nothing ,
and when transform done,we can remove the mark,

English is not my 1st language hope you know what I mean, your code give me a lot help ,thank you.